Global Patent Index - EP 0575618 A4

EP 0575618 A4 19940706 - SUPERCONDUCTIVE BEARING DEVICE

Title (en)

SUPERCONDUCTIVE BEARING DEVICE

Publication

EP 0575618 A4 19940706 (EN)

Application

EP 92906697 A 19920313

Priority

  • JP 5143091 A 19910315
  • JP 17535691 A 19910716
  • JP 9200301 W 19920313

Abstract (en)

[origin: EP0575618A1] A superconductive bearing device includes a ring-like permanent magnet portion (2) disposed concentrically on a vertical axial rotor (1), and a superconductor (8) disposed below the permanent magnet portion (2) in such a manner as to face the lower surface of the former (2) with a vertical gap between them. The permanent magnet portion (2) comprises a disc (4) fixedly disposed on the rotor (1) and a plurality of ring-like permanent magnets (6a, 6b) so disposed on the disc (4) as to be spaced apart from one another in the radial direction of the rotor (1). The upper and lower end portions of each permanent magnet (6a, 6b) have mutually opposite magnetic polarities, and the corresponding end portions, in the vertical direction, of adjacent permanent magnets (6a, 6b) have opposite magnetic polarities. The gap of the permanent magnets (6a, 6b) in the radial direction is optimized on the basis of the dimension (width) of the magnets (6a, 6b) in the radial direction. Therefore, a load capacity and rigidity can be improved, shaft vibration of the rotor can be prevented and the rotor (1) can be supported stably in the non-contact state. <IMAGE>

IPC 1-7

F16C 32/04

IPC 8 full level

F16C 32/04 (2006.01); F16C 39/06 (2006.01); H02J 15/00 (2006.01)

CPC (source: EP US)

F16C 32/0438 (2013.01 - EP US); F16C 2240/40 (2013.01 - EP US); F16C 2300/34 (2013.01 - EP US)

Citation (search report)

  • [A] WO 9003524 A1 19900405 - EASTMAN KODAK CO [US]
  • [AP] EP 0467341 A1 19920122 - KOYO SEIKO CO [JP]
  • [E] WO 9210871 A1 19920625 - UNIV HOUSTON [US]
  • [A] PATENT ABSTRACTS OF JAPAN vol. 14, no. 81 (M - 935)<4024> 15 February 1990 (1990-02-15)
  • [A] MARINESCU ET AL.: "Passive Axial Stabilization of a Magnetic Radial Bearing by Superconductors.", IEEE TRANSACTIONS ON MAGNETICS, vol. 25, no. 5, September 1989 (1989-09-01), NEW YORK (US), pages 3233 - 3235, XP000069079
  • [AP] YONNET ET AL: "Stacked Structures of Passive Magnetic Bearings.", JOURNAL OF APPLIED PHYSICS, vol. 70, no. 10.2, 15 November 1991 (1991-11-15), NEW YORK (US), pages 6633 - 6635, XP000281729
  • See references of WO 9216762A1

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0575618 A1 19931229; EP 0575618 A4 19940706; EP 0575618 B1 19990526; DE 69229264 D1 19990701; DE 69229264 T2 19991104; DE 69233377 D1 20040805; DE 69233377 T2 20050630; EP 0829655 A1 19980318; EP 0829655 B1 20040630; JP H05180225 A 19930720; JP H0737812 B2 19950426; US 5801469 A 19980901; WO 9216762 A1 19921001

DOCDB simple family (application)

EP 92906697 A 19920313; DE 69229264 T 19920313; DE 69233377 T 19920313; EP 97121219 A 19920313; JP 17535691 A 19910716; JP 9200301 W 19920313; US 11708894 A 19940208